TAMPA -- In a speech that emphasized quiet competence over soaring rhetoric, Mitt Romney on Tuesday night became the first Mormon to accept the Republican Party&apos;s nomination for president -- a historic achievement that eluded his father during his own White House run 44 years ago. In a nod to the appeal of the message of hope and change that helped sweep Barack Obama into the White House four years ago, Romney said that the president had failed to achieve his lofty goals and made clear that his own objectives for the nation would address more immediate concerns. &ldquo;President...